Power-Down Instruction; Address And Vset Resistor; Adjustment Of Address Resistor - Flex BMR474 ROA User Manual

4.2

Power-down instruction

5

Address and VSET Resistor

5.1

Adjustment of address resistor

28701-ROA1286016 Rev A
Make sure Enable switch is set to OFF position
•
• By default, the module is configured to set Vout with pin-strap resistors.
Make sure jumper in the position 10 is populated with desired Vout.
Connect power supply to connectors on position 1.
•
Connect load to connectors on position 2.
•
Connect the PMBus adapter/cable to the board.
•
• Apply Vin = 6-15V through connectors on position 1.
• Set Enable switch to ON position. The power good LED will give green
light.
Note: PG LED is powered by USB-PMBus adapter, so only connect demo
board with computer through adapter, LED will be lit when module Vout is
ready.
• Then increase the load, and through K2 (position 7) to measure the Vout
and ripple.
• Set Enable switch to OFF position
• Turn off Vin
• To change the address, change the resistor shown in Figure 2. Change R4
and R5 (position 11) to achieve the desired PMBus address for the
module.
Refer to chapter 'PMBus addressing' in the technical specification to select
•
the proper values.
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